Technical data

10.0 Commissioning the Boiler
29
10.2 Increasing Central Heating Output
To 100,000 Btu/hr
1. The boiler is factory set for a maximum output
of 80,000 Btu/hr. The boiler will automatically vary
its output to match the system load giving the
most efficient use of gas and the most
comfortable room temperature possible.
2. If the CH system requirement is greater than
80,000 Btu/hr then to increase the maximum
output of the boiler to 100,000 Btu/hr proceed as
follows:
a) While On or OF is shown on the display ie: no
CH or DHW demand ongoing. Depress the “+”
and “-” Temperature Control Buttons at the same
time for 5 seconds. The display will show “18”
(Fig. 35) where the “1” indicates that the installer
parameter for range rating has been accessed
and the “8” indicates that the boiler is presently
set for a maximum Central Heating output of
80,000 Btu/hr.
b) Press the “+” Temperature Control Button twice
so that the display shows “10” (Fig. 36) with the
“0” indicating that the boiler is set for a maximum
Central Heating output of 100,000 Btu/hr. 1
minute after the parameter has been set the
display will revert to normal operation.
NOTE: The boiler will need to run in CH for 30
minutes after this is done to change to 100,000
Btu/hr. i.e. Turn all CH controls to max and ensure
no DHW demand is activated, during this setting
period. To extract 100,000 Btu/hr from the boiler an
additional pump will need to be fitted to the system
(see the electrical installation section of these
instructions).
10.3 Switching Off The Intelligent Pre-
heat
1. The boiler includes an intelligent pre-heat
feature. This feature ensures that the domestic
hot water to the tap is pre-heated only when the
user required domestic hot water the previous
week. For example, if the user only requires hot
water between 7.00am and 8.00am on Monday
then the boiler will log this demand and then the
next week will only pre-heat between 7.00am and
8.00am on Monday. During the first week of
operation from power on no pre-heating will occur.
2. The pre-heat switches the boiler on for
approximately 1 minute every 40 minutes
whenever it is required.
3. The boiler is factory set with the pre-heat
feature on. If it is required to disable this feature
then depress the “+” and “-” Temperature Control
Buttons at the same time for 5 seconds. The
display will show “18 or 10” (Fig. 35 or 36). Press
the Summer/Winter Mode Button marked
( ) and the display will show “21” (Fig. 37).
The “2” indicates that the installer parameter for
pre-heat has been selected. The “1” indicates that
the pre-heat is switched on.
4. Press the “-” Temperature Control Button to
change this to “20” (Fig. 38), with the “0”
indicating that the pre-heat is switched off. One
minute after the parameter has been set the
display will revert to normal operation.
C
o
Reset
C
o
Reset
C
o
Reset
C
o
Reset
Fig. 35
Fig. 36
Fig. 37
Fig. 38
Temperature
Control Buttons
Reset
Button